Add docker deploy to flake

flake.nix

@@ -14,20 +14,55 @@
     flake-utils.lib.eachDefaultSystem (
       system: let
         pkgs = nixpkgs.legacyPackages.${system};
+
+        deploy = pkgs.writeShellScriptBin "deploy" ''
+          set -e; set -o pipefail; set -x;
+
+          nix build .#docker
+          image=$((docker load < result) | sed -n '$s/^Loaded image: //p')
+          docker image tag "$image" harbor.julian-mutter.de/sheetless/sheetless-server:latest
+          docker push harbor.julian-mutter.de/sheetless/sheetless-server:latest
+        '';
       in {
         devShells.default = pkgs.mkShell {
           buildInputs = with pkgs; [
             go
             gopls
             go-tools
+
+            deploy
           ];
         };
 
-        packages.default = pkgs.buildGoModule {
-          pname = "sheetless-server";
-          version = "0.1.0";
-          src = ./src;
-          vendorHash = "sha256-NnHo1wcsX0aCBpay8eEyjmtO7+Qe8gcBPITobP7WtkA=";
+        packages = rec {
+          default = sheetless-server;
+
+          sheetless-server = pkgs.buildGoModule {
+            pname = "sheetless-server";
+            version = "0.1.0";
+            src = ./src;
+            vendorHash = "sha256-NnHo1wcsX0aCBpay8eEyjmtO7+Qe8gcBPITobP7WtkA=";
+          };
+
+          docker = pkgs.dockerTools.buildImage {
+            name = "sheetless-server";
+            tag = "latest";
+
+            copyToRoot = with pkgs; [
+              dockerTools.usrBinEnv
+              dockerTools.binSh
+              dockerTools.caCertificates
+
+              coreutils
+              sheetless-server
+            ];
+
+            config = {
+              Cmd = ["/bin/sheetless-server"];
+              Expose = "8080";
+            };
+            created = "now";
+          };
         };
       }
     );